There’s an interesting post up on The Financial Brand blog about Bank of America’s effort to enhance its customer service via Twitter.

The bank might want to think twice about that.

I noticed an interesting tweet the other day on Wachovia’s Twitter customer service feed.

Wachovia tweeted: “What Wachovia banking questions can I help with today? Send them to me, but don’t send any personal financial info.”

That’s odd, I thought. Who would send their personal financial information via Twitter? So I posted a tweet to Wachovia’s feed asking, “Do people often tweet their personal details?”

Wachovia answered, “It may happen from time 2 time. We want to err on the side of protecting customers & preventing information sharing. So we tweet 2 help.”

From “time to time” is not never. And if it happens to Wachovia, I have little doubt that the Twitter feeds from the nation’s other major banks find similar information published for the world to see. Does this nix Twitter as a customer service channel? Of course not. But it does raise a bright red flag. There are risks everyone, including on Twitter.